configs/BeBoPr : Modify ReadTemp.py to support multiple ADC channels
Trying to read multiple values at the same time (which could happen when
running multiple instances of the previous ReadTemp.py) causes the kernel
adc reader to return invalid values.  This update modifies ReadTemp.py so
it reads multiple values in sequence, with a 1 mS delay between each read.
Hopefully, this will work around the issue with the BeagleBone ADC driver.